发明名称 |
System and Related Circuits and Methods for Detecting and Locating Cellular Telephone Use Within a Geographical Area or Facility |
摘要 |
A system for detecting and locating illicit cellular telephone use within a facility includes an array of radio frequency (RF) receivers, each receiver being placed in a predetermined location in the facility, and a central server, the receivers being in electrical communication with the central server. The server commands a group or groups of receivers to tune to a frequency of interest and to perform detailed sample rate measurements of the RF signal level received at the receivers. The array of receivers is organized into a plurality of measurement areas covering widely separated areas of the facility or different buildings of the facility, and the plurality of receivers of a measurement area is organized into a plurality of measurement groups covering areas of approximately uniform RF propagation conditions. Each receiver scans a frequency band of interest non-synchronously and independently of the other receivers in the array. Also, each receiver is preferably a direct-conversion receiver. |
申请公布号 |
US2012088490(A1) |
申请公布日期 |
2012.04.12 |
申请号 |
US201113330231 |
申请日期 |
2011.12.19 |
申请人 |
OLBERS ROBERT L.;LIU YUAN-MIN;NESKY MARK S.;PLECAS CRAIG A.;REYES JOSEPH L.;KEIMIG JOHN;HORVATH KENJI C.;EXELIS INC. |
发明人 |
OLBERS ROBERT L.;LIU YUAN-MIN;NESKY MARK S.;PLECAS CRAIG A.;REYES JOSEPH L.;KEIMIG JOHN;HORVATH KENJI C. |
分类号 |
H04W24/00;H04W12/12;H04W48/02;H04W64/00;H04W88/08 |
主分类号 |
H04W24/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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